most citedThe algebraic numerical range as a spectral set in Banach algebras

2 citations · 2 across the 2 of their papers we have counts for

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2 papers

math.FA2024★ 2 cited

The algebraic numerical range as a spectral set in Banach algebras

Hanna Blazhko, Daniil Homza, Felix L. Schwenninger +2

We investigate when the algebraic numerical range is a -spectral set in a Banach algebra. While providing several counterexamples based on classical ideas as well as combinatori…

math.CO2022

Counting Unions of Schreier Sets

Kevin Beanland, Dmitriy Gorovoy, Jȩdrzej Hodor +1

A subset of positive integers is a Schreier set if it is non-empty and (here is the cardinality of ). For each positive integer , we define $k…